Long-lived photoinduced charge separation in a bridged C-60-porphyrin dyad
Long-lived photoinduced charge separation in a bridged C-60-porphyrin dyad
复制标题
DOI：
10.1016/s0009-2614(97)00193-0
复制
发表时间：
1997-04-11
影响因子：
2.8
通讯作者：
PaddonRow, MN
中科院分区：
文献类型：
--
作者：
Bell, TDM;Smith, TA;PaddonRow, MN
研究了四芳基卟啉锌（P-Zn）与C-60受体之间的长程光诱导能量和电子转移。在非极性溶剂中，观察到从P-Zn到C-60的单重态-单重态能量转移，但在苯甲腈中，发生有效的（> 90%）电荷分离，速率常数为1 × 10（10）sec（-1），产生P-Zn（.+）。9 σ-C-60（.-）。电荷分离态具有非常长的寿命为420 ns的二进制。这种行为进行了讨论与参考的能量，动力学和轨道对称性所涉及的国家。
Long-range photoinduced energy and electron transfer have been investigated in a novel dyad containing a zinc tetraarylporphyrin (P-Zn) donor and a C-60 acceptor separated by a saturated norbomylogous bridge nine sigma bonds in length (P-Zn-9 sigma-C-60). In non-polar solvents singlet-singlet energy transfer from P-Zn to C-60 is observed but in benzonitrile efficient (> 90%) charge separation occurs with a rate constant of 1 x 10(10) sec(-1) to yield P-Zn(.+)-9 sigma-C-60(.-). The charge separated state exhibits a remarkably long lifetime for a dyad of 420 ns. This behaviour is discussed with reference to the energetics, dynamics and orbital symmetry properties of the states involved.